Hogback /(?)/

Hog·back

Hogback

n.
  1. An upward curve or very obtuse angle in the upper surface of any member, as of a timber laid horizontally; -- the opposite of camber. (Arch.)
  2. See Hogframe. (Naut.)
  3. A ridge formed by tilted strata; hence, any ridge with a sharp summit, and steeply sloping sides. (Geol.)